Angle-cock device



Feb. 28, 1928. 1,660,484

c. c. FARMER ET AL ANGLE cock DEVICE Filed April 2s.' 1927 llllllm.

'NVENTORS CLYDE c.F-AR-|ER THOMAS Hrm-@MAS Patented Feb. 28, `1928.

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Anerlnioook' DEVICE:

Application ledpAprilQS, 1927.. Seriali No. 185,976;

This invention relates to fluid` pressure brakes and more particularly' to van angle.l cock device, such as employed to control'. communication through the brake pipe of a fluid pressure brake system. 1

It' the usual angle-cock device inthe brakev pipe at one end of a car is turnedl to closed position, the operators control4 oi' the'bnakes on the train back of the closed: anglel cock is lost, sothat under such` conditions it the operator. makes a brake pipe reduction, the brakes will be .applied only on the cars aheadV of. the closed angle cock, and thetrain Will not have a sufficient retarding force to stop in a required distance. As a result, thetra'iny limited time the connection. tl'rrough'- the `brakepipe' will be automatically opened aoaan.

has shown in the drawing,.the: single'- figure: is a .plan view, partly -se'cti0ned,.ot. an'. angle.` cock deviceembodying oury invention..

According to thev drawing, theV angle: cock device comprises a. casing, having'a passage- Way 1 adapted tobe connected to2 the usual`- brake pipe and a; passageway 2: at an angle-` and adapted to be connected. to ther usual, flexible hose.

interposed. between passagewaysfl and; 2a isa plug valveV 3 having a central opening 4 for controlling communication` betweensaid passageways, and secured to they outer end of the plug valve: is the usual handle 5; by which theplug valve can be turned. Y

v.ilicconding to our invention, the casing also,- contains a piston 6, forming atone sides chamber 7. connected toy the atmospherel through port 8 and orniingatthe opposite side a chamber 9, said piston. being adaptedi.` in its outward position to seal on a gasket-:25:-

The piston` 6 has a valve portion 10, slidably. fitted. in asuitable. chamber: in? vthe cas;-y

ing,and having. a seatri'ng 11 formed at n rEhe valve portion. 1()` 1s adapted to control. communication between.

the lower.y end.

pass-age 12, which isconnected to passageway lvthrough the choke plug 131 and pas?` sage 14k, which is connected. through. a choke plug 15 tof' the: passageway 2.y lQutvva-rdmovement ot thepiston 6 and valveportion- 101s Vopposedy by the pressureof a spring; 16

interposed between the piston. valve portion4 10- and the casingy wall. The casing also has a chamber 17, connected, to the piston chamber 9' by a passagey 18 andcontaining a valve-- 193. normally held.

seated by thefpressureot a, springg20z The valveL has a luted-stem21'entending through` ka-n openingV in; thewwall of. they casing atv the outer end,I the stem` 21, is adapted.y to be` iittcd with a push button 22I 'A restricted passage-23i connects the. piston chamber 9 tothe passage-l and a restricted passager 211'.

connects the passages 12"' and 141;

Ing operation, with the plugl valve `3' ,in-KL the openv position,l asshownA in thev drawing,

the brake pipe. isV charged` through passage--v way 1 opening; 4 im the plug; val-ve. 3 and` I passageway 2, in theL usual manner.

- Fluid under pressurey in' the passageway l1 l flows through the? choke plug 13,..passag.e:12',

and: restricted passage 24 intof passage M and: also from passageway 2; through choke plug 15 into. passage 14C and= then. through the restricted passageA 23 into piston. chamber Q-and. from. said, chamber through passagey 18 into valve chamber 17.; With, the valve;` 19; seated', asshoavn ini the drawing, a pres-y sure builds upf, in chamber 9@ actson the piston` 6i. When the pressurein chamber 9L betweenv passagewaysr4 1 and 2 through the central openi'iigfi-in the plug-'val-veisclosed, said' passageways are still. connectedthrough the chokei plugf 13g. passages 12 andi 14v and? choke plug 15,rso. that service applications and release' oitthe brakes can be eiiectedlonl the whole train; in the. usual manner, and' even an emergency application of the brakes may be made on the whole train in the usual manner.

It' it is desired to cut olf a ear or a portion of a ,train in which the brake v.System is charged, the handle 5 of the angle cock devices on the ends of the two adjoining cars, where the uncoupling is to be effected, 1s turned, so as to close the connection between passageways 1 and 2 through the central Opening 4 in the plug valve 3. The valve 19 in both angle cock devices is then unseated by-pressing the push button 22, thereby "permit-ting the fluid under pressure in valve chamber17 tobe vented to the atmosphere past the iuted stem of the valve. Piston chamber 9 being connected to the valve chamber 17 by passage 18, thefluid under pressure in chamber 9, acting on the piston- 6, is also vented to theatmosphere,

and permits spring 16 to shift the piston 6 and valve portion 10 to the position shown on the drawing, in which position passages 12 and 14 are disconnected, except through the restricted port 24.

VAfter the pistons 6 are shifted to the posi-- vtion shown on the drawing, the valve 19 in Ace only one of the angle cock devices is held unseated, while the hose Vcouplings are being uncoupled. i

plings are uncoupled, so as to prevent the Huid under pressure flowing through the restricted passage 24 from operating thepiston 6 to reconnect the passages 12 andl 14 prior to accomplishing the uncoupling operation. i f p After the hose couplings are uncoupled between the cars, the valve 19 is allowed to seat. There will then be a flowof fluid under pressure to the atmosphere from the brake pipe by Way of therestricted port 24 and the openv end of the hose coupling. However, the rate of said flow is such asto have substantially no influence on the brake operation. i

It a train is uncoupled and then recoupled and the trainman neglects to open the angle cock device on the end of each car, Where the recoupling is made, then the flow of fluid under pressure through the restrictedv pas-r sage24, passage 14, and' restricted passage 23 will gradually build up a pressure in piston chamber `9 and shift the piston 6 and valve portion 10 to their outward position and `thus connect the passages 12 and 14 through the valve portion chamber, so as to ,stricted cock.

`.It will be noted that in the outward posi` tion of the piston 6, the piston seals on a gasket 25. unnecessary leakage from the piston chamber 9 and the brake pipe to the piston chamber 7 and then to the atmosphere through the passage 8. i

Having now described our invention, what we claim as new and desire to secure by Letters Patent, is f 1. An angle cock device having a brake pipe controlling valve-and provided with a' by-pass'around said valve, valve means subject to brake pipe pressure 'lor controlling communication through said by-pass, and a manually operable valve for venting iiuid under pressure from said valve means.

` 2. An angle cock device having a brake pipe controlling valve and provided with a by-pass around said valve, valve means operated by brake pipe pressurerfor opening communication through said by-pass, and a manually operable valve for venting fluid under pressure from said valve means to permit said valve means to close communication through said by-pass. The valve 19 in one of the angle cock de` vices is held unseated until the hose cou-` 4. An angle cock device having a bra-ke pipe controlling valve andprovided with a by-pass around said valve, a valve device for controlling communication through said bypass, and means for restrictingthe flow of liuid through said by-pass.

5. An angle cock device havingfa brake pipe controlling cock, a passage around said cock` for establishing communication from one side of the cock to the other, a valve for controlling communication through said passage, said passage having a restrictedport opening to one side of the brake pipe controlling valve.

6. An angle cock device having a brake pipe controlling cock, a passage around said cock tor` establishing communication from one side of the lcock to the other,`a valve :for controlling communication through said passage, saidlpassage havinga restricted port opening to one side of the cock `and a re- `7. An angle cock device having brake pipe controlling cock, a passage around said' port opening tothe other side of the This is desirable, so as to prevent cock for establishing communication fromone side of the cock to the other, 4a valve for controlling communication through said passage, a piston for operating said valve, and a restricted port connecting said rpassage to one side of said piston.

8. An angle cock device having a brak pipe controlling cock, a passage around said cock for establishing communication from one side of the cock to the other, a valve for controlling communication through said passage, a piston for operating said valve, arestricted port for supplying fluid from said passage to one side of said piston,r and a manually operable valve for venting iiuid from said piston.

9. An angle cock device having a brake pipe controlling cock, a passage around said cock for establishing communication from one side of the cock to the other, a valve for controlling communication through said passage, a piston forv operating said valve, a, re-

manually operable valve for venting fluid from said piston at a greater rate than Huid is lsupplied thereto through said restricted port.

10. An angle cockdevice having. a brake pipe controlling cock, a passage around said cock for establishing communication from one side of the cock to the other, a valve for controlling communicationthrough said passage, a piston for operating said valve, and a restricted port establishing a communication through said passage around said valve.

In testimony whereof We have hereunto set our hands. Y v

CLYDE- C. FARMER. THOMAS I-I. THOMAS. 

